docs: general fixes and improvements (#7918)

* docs improvements and changes

* updated module definition

* modules + dml changes

* fix build

* fix vale error

* fix lint errors

* fixes to stripe docs

* fix condition

* fix condition

* fix module defintion

* fix checkout

* disable UI action

* change oas preview action

* flatten provider module options

* fix lint errors

* add module link docs

* pr comments fixes

* fix vale error

* change node engine version

* links -> linkable

* add note about database name

* small fixes

* link fixes

* fix response code in api reference

* added migrations step

www/apps/book/app/advanced-development/data-models/index/page.mdx

@@ -8,7 +8,7 @@ In this chapter, you’ll learn how to define indices on a data model.
 
 ## Define Index on Property
 
-Define an index on a property using the `model` utility's `index` method.
+Use the `index` method on a property's definition to define an index.
 
 For example:
 
@@ -38,12 +38,12 @@ In this example, you define an index on the `name` property.
 
 ## Define Index on Data Model
 
-A data model has an `indexes` method that defines indices on the data model.
+A data model has an `indexes` method that defines indices on its properties.
 
 The index can be on multiple columns (composite index). For example:
 
 export const dataModelIndexHighlights = [
-  ["7", "indexes", "Define indices on the data model."],
+  ["7", "indexes", "Define indices on the data model's properties."],
   ["9", "on", "Specify the properties to define the index on."]
 ]